[Asterisk-Users] Weird rtpmap issue

[Adrian A]

I have the following in sip.conf:

disallow=all                    ; First disallow all codecs
allow=ulaw                      ; Allow codecs in order of preference
allow=alaw
allow=gsm
allow=ilbc
allow=speex


All SIP messages that come out of Asterisk have the following in the SDP:

m=audio 19092 RTP/AVP 0 8 3 97 97 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:3 GSM/8000
a=rtpmap:97 iLBC/8000
a=rtpmap:97 speex/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16


Does anyone have any idea why speex and iLBC have the same rtpmap number???
This is an Asterisk 1.2.1 installation.
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